36440494781 has 16 divisors (see below), whose sum is σ = 37600252800. Its totient is φ = 35295499008.

The previous prime is 36440494777. The next prime is 36440494793. The reversal of 36440494781 is 18749404463.

36440494781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 36440494781 - 2² = 36440494777 is a prime.

It is a super-2 number, since 2×36440494781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36440494711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6648200 + ... + 6653678.

It is an arithmetic number, because the mean of its divisors is an integer number (2350015800).

Almost surely, 2^36440494781 is an apocalyptic number.

It is an amenable number.

36440494781 is a deficient number, since it is larger than the sum of its proper divisors (1159758019).

36440494781 is a wasteful number, since it uses less digits than its factorization.

36440494781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6788.

The product of its (nonzero) digits is 2322432, while the sum is 50.

The spelling of 36440494781 in words is "thirty-six billion, four hundred forty million, four hundred ninety-four thousand, seven hundred eighty-one".